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SYNTHESIS AND PRELIMINARY STRUCTURAL CHARACTERIZATION OF SOME LANTHANIDE(III) SEMICARBAZONE COMPLEXES

Authors
Publisher
Chemical Society of Ethiopia
Publication Date
Keywords
  • Lanthanide(Iii) Complexes
  • 4[N-(2'-Hydroxy-1'-Naphthalidene)Amino]Antipyrine Semicarbazone
Disciplines
  • Physics

Abstract

Some six and nine coordinated complexes of trivalent lanthanide metal ions with 4[N-(2'-hydroxy-1'-naphthalidene)amino]antipyrinesemicarbazone (HNAAPS) with the general composition LnX3.n(HNAAPS) [X = NO3, n = 1; X = NCS or ClO4, n = 2; Ln = La, Pr, Nd, Sm, Gd, Tb, Dy or Ho] have been isolated. All the complexes have been characterized on the basis of analytical data, molar conductance, magnetic susceptibility, electronic and infrared spectral measurements. The ligand HNAAPS behaves as neutral tridentate (N, N, O) ligand. The coordination number of the central metal ion is either six or nine in these complexes. Thermal properties of these complexes were also investigated. KEY WORDS: Lanthanide(III) complexes, 4[N-(2'-hydroxy-1'-naphthalidene)amino]antipyrine semicarbazone Bull. Chem. Soc. Ethiop. 2006, 20(1), 167-172.

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